Sleeper particularly for heavy dredging-type tracks



March 17,1931. J. GROSSWEISCHEDE 1,796,555

SLEEPER PARTICULARLY FOR HEAVY DREDGING TYPE TRACKS Filed July 25, 1929 l l i l i R 1 E u a n u n u 55 E] J Wf/ness es Jn Van/0r.

Patented Mar. 17, 1931 UNITED STATES PATENT OFFICE FIRM VEREINIGTE STAHLIVERKE AKTIENGESELLSCHAFT, 0F DUSSELDORF, GER

MANY

SLEEPER PARTICULARLY FOR HEAVY DREDGING-TYPE TRACKS Application filed July 23, 1929, Serial No.

The use of iron hollow sleepers for dredg ingtype tracks, for instance hollow sleepers laid on brown-coal surface field, has become known. However, the heretofore developed shapes having certain faulty designs have been found unsatisfactory in service when used for heavy excavators and bridges. If the moment of resistance of the shaped sleepers was of sufficient value, the sleeper was too heavy for requisite advancing of the track and also regarding the outer contour almost impracticable to said longitudinal moving. But the shapes of light type suffered from insuflicient strength so that the shape due to inevitable shocks applied to them in service was destroyed.

The subject of the present invention is an iron hollow sleeper, especially for heavy dredging-type tracks, in which the abovenamed drawbacks are overcome. According to the invention for the manufacture of the sleeper a closed tube either seamless drawn or welded in any manner is used. Such sleepers have the advantage that at all times a very good seating upon the ground and an approximately unhindered longitudinal advancing are obtained. They have the mess sary moment of resistance and a good elasticity and all these advantages are obtained with expenses for materials as low as possible.

The topside and under side of the sleeper are reinforced at the centre part where the greatest strains take place by a mid-web consisting of a profile of any suitable form, so that the load is transmitted in most satisfactory manner and the resulting moments of flexion are of a value as high as possible.

In the accompanying drawing some suitable forms of construction of the new sleeper are illustrated.

Fig. 1 shows a side view of a finished sleeper in connection with rails for dredgingtype tracks, while Fig. 2 shows a top view thereof.

Figs. 3 to 5 show some practicable shapes of cross section of the sleeper made of a single tube with reinforcement by the insertion of an I-iron.

In the forms of construction shown in the 380,375, and in Germany August 9, 1928.

different figures the finished shape is essentially made of a. closed tube either seamless drawn or welded in any manner and finished prior to forming them to sleeper-shape, thus of a body having at approximately all points uniform strength.

In the so manufactured sleeper a over its whole length a reinforcement in form of a mid-web is inserted, which consists, as shown in Figs. 3 to 5, of an I-iron 1). Instead of the latter any other suitable profile-iron can be used as mid-web.

What I claim, is:

1. A sleeper, particularly for heavy dredging-type tracks, consisting of a tubular metal body with an I-iron longitudinal reinforcement.

2. A sleeper as specified in claim 1, in which the tubular metal body consists of a seamless drawn tube.

3. A sleeper as specified in claim 1, in which the tubular metal body consists of a welded tube.

In testimony whereof I have hereunto set my hand.

JULIUS GROSSIVEISCI-IEDE.

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